A Moscow court has rejected opposition leader Aleksei Navalny's lawsuit against President Vladimir Putin accusing the Russian leader of a conflict of interest in the awarding of $1.75 billion in government financing to a company partly owned by his son-in-law.

Anastasia Dzyurko, a spokeswoman for the Tverskoi district court, said on February 12 that a judge rejected the lawsuit Navalny filed a day earlier because it did not qualify for consideration under "administrative proceedings," Russian media reported.

Public records show that Putin in October tasked his government with allocating $1.75 billion in state financing for a massive refinery being built in western Siberia by Sibur, Russia's largest gas and petrochemicals processor.

The second-largest shareholder in Sibur is Kirill Shamalov, who has been identified in Russian and Western media as the husband of one of Putin's daughters.

Navalny said in his lawsuit that Putin was required by Russian law to disclose a conflict of interest when he instructed officials to finance the Sibur project.

Both Shamalov and the Kremlin have refused to confirm reports that he is married to Putin's younger daughter but have not denied them.

Shamalov, the son of a longtime associate of Putin's, holds a 21.3 percent stake in Sibur, making him the company's second-largest shareholder.

Navalny, a driving force in the opposition street protests that preceded Putin's return to the Kremlin in 2012 following a four-year stint as prime minister, wrote on his blog that "the truth is on our side."

"It is an undeniable fact that Putin personally made the decision to give his son-in-law's company $1.75 billion from the National Welfare Fund," he wrote. "Any normal person (even if he is a supporter of Putin) will agree that there is a conflict of interest here."

Irina Yarova, a member of Putin's ruling United Russia party and head of the security committee in the lower house of parliament, said that Navalny's lawsuit was aimed at discrediting Putin ahead of a high-profile annual security conference that kicked off in Munich on February 12, the state-owned RIA Novosti news agency reported.

Kremlin spokesman Dmitry Peskov was quoted by the state-owned TASS news agency as saying on February 11 that Putin was unaware of the lawsuit.